Novak Djokovic not a blues fan
World number one tennis player Novak Djokovic has overcome most opponents in the past year - but the controversial blue clay of the Madrid Open has proven a particularly difficult adversary.
The dyed surface is meant to make balls easier to see, but after wining his second round match the Serb said it was very slippery and claimed he was forced to rely on his serve and unforced errors to win.
Afterwards, he complained: "For me that's not tennis. Either I come up with the football shoes or I invite Chuck Norris to advise me on how I should play on this court."
Fans booking hospitality packages for Wimbledon 2012 will see Djokovic playing on a surface he is much more comfortable with, having won the men's title on the grass for the first time last year.
Andy Murray is missing the Madrid tournament - which he won when it was played on a hard court in 2008 - due to a back injury.
By Liz Johnstone